semvercomp

🐍 Semantic Version Comparison for Python

Implementation of a Version object with comparison capabilities and tag validation following semver conventions.

Installation

pip install semvercomp

Usage

• Classes
  • Version
• Comparison of Version Objects
  • Equal
  • Greater
  • Lower
• Validation
  • validate_version
• Utils
  • to_version_list

Classes

Version(major=0 : int, minor=0 : int, patch=0 : int, pre_release="" : str, patch="" : str, has_v=False : str)

Class Version represents a version tag following semver conventions. A version tag is structured the following way:

X.Y.Z-pre+build

Source: Semantic Versioning 2.0.0

• Public Properties

• Instance of Version

from semvercomp.Version import Version

ver = Version(1, 0, 0, 'beta', '20191224')
print(str(ver))
# 1.0.0-beta+20191224

• Creating a Version object from a version string:

from semvercomp.Version import Version

str_v = Version()
str_v.parse_version_number('v1.0.0-beta')
# str_v.major == 1
# str_v.minor == 0
# str_v.patch == 0
# str_v.has_v == True
# str_v.pre_release == 'beta'

Comparison of Version Objects

Version class implements __gt__, __lt__ and __eq__ built-in methods to implement comparison.

Equal

from semvercomp.Version import Version

a = Version(1, 0, 0)
b = Version(1, 0, 0)
print(a == b) # True

Greater

from semvercomp.Version import Version

a = Version(1, 1, 0)
b = Version(1, 0, 0)
print(a > b) # True

Lower

from semvercomp.Version import Version

a = Version(0, 1, 0)
b = Version(1, 0, 0)
print(a < b) # True

Validation

It is possible to validate and gather the different members of a version tag using validate version from semvercomp.validators.

validate_version(version: str): (parts: dict(), is_ok: bool)

Will return a tuple where, the first element is a dictionary with the properties of the given version tag destructured.

The second element in the tuple is a boolean flag that stands as the validation result.

from semvercomp.validators import validate_version

ver_str = 'v1.0.22'
(parts, is_ok) = validate_version(ver_str)
print(parts) # {'has_v': True, 'major': 1, 'minor': 0, 'patch': 22, 'pre_release': None, 'build': None}
print(is_ok) # True

Utils

to_version_list(coll: iterable): Version[]

Create an array of Version objects from an iterable of version tags as strings.

from semvercomp.utils import to_version_list

all = [
	'1.0.0-beta',
	'0.1.0+1234',
	'33.22.3'
]

versions = to_version_list(all)

Development

Requirements

• pyenv
• pipenv
• Visual Studio Code Recommended

Debugging

• Debugging tests Tests for this package are written with pytest. The following json, is an example of the .vscode/settings.json:

{
	"python.pythonPath": /* Your Python Binary Address*/,
	"python.testing.pytestArgs": [
		"tests"
	],
	"python.testing.unittestEnabled": false,
	"python.testing.nosetestsEnabled": false,
	"python.testing.pytestEnabled": true
}

Testing

• Running unit tests

# from repository root directory
pytest

• Running test coverage

# from repository root directory
pytest --cov=semvercomp tests/

# or with html report
pytest --cov-report html --cov=semvercomp tests/